The horse has played a little known but very important role in the field of
medicine. Horses were injected with toxins of disease until their blood build up
immunities. Then a serum was made from their blood. Serums to fight with
diphteria and tetanus were developed this way.
It can be inferred from the passage, that horses were
(A) given immunity to diseases
(B) generally quite immune to diseases
(C) given medicines to fight toxins
(D) given diphtheria and tetanus serums
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c)given medicines to fight toxins
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Hi there. The answer is (A) given immunity to diseases.
According to the passage, horses were injected with toxins to develop immunity in their bodies through their blood. The blood serum became a vaccine for diseases such as diphteria and tetanus. We have the horses to be thankful for because today people are safe from diphteria and tetanus as long as you get vaccinated.
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